aclocal.m4 62.8 KB
Newer Older
1 2 3 4
# Extra autoconf macros for the Glasgow fptools
#
# To be a good autoconf citizen, names of local macros have prefixed with FP_ to
# ensure we don't clash with any pre-supplied autoconf ones.
sof's avatar
sof committed
5

6

7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
AC_DEFUN([GHC_SELECT_FILE_EXTENSIONS],
[
    $2=''
    $3='.so'
    case $1 in
    *-unknown-cygwin32)
        AC_MSG_WARN([GHC does not support the Cygwin target at the moment])
        AC_MSG_WARN([I'm assuming you wanted to build for i386-unknown-mingw32])
        exit 1
        ;;
    *-unknown-mingw32)
        windows=YES
        $2='.exe'
        $3='.dll'
        ;;
    i386-apple-darwin|powerpc-apple-darwin)
        $3='.dylib'
        ;;
    x86_64-apple-darwin)
        $3='.dylib'
        ;;
28
    arm-apple-darwin10|i386-apple-darwin11)
29 30 31 32 33 34
        $2='.a'
        $3='.dylib'
        ;;
    esac
])

35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66
# FPTOOLS_SET_PLATFORM_VARS
# ----------------------------------
# Set the platform variables
AC_DEFUN([FPTOOLS_SET_PLATFORM_VARS],
[
    # If no argument was given for a configuration variable, then discard
    # the guessed canonical system and use the configuration of the
    # bootstrapping ghc. If an argument was given, map it from gnu format
    # to ghc format.
    #
    # For why we do it this way, see: #3637, #1717, #2951
    #
    # In bindists, we haven't called AC_CANONICAL_{BUILD,HOST,TARGET}
    # so this justs uses $bootstrap_target.

    if test "$build_alias" = ""
    then
        if test "$bootstrap_target" != ""
        then
            build=$bootstrap_target
            echo "Build platform inferred as: $build"
        else
            echo "Can't work out build platform"
            exit 1
        fi

        BuildArch=`echo "$build" | sed 's/-.*//'`
        BuildVendor=`echo "$build" | sed -e 's/.*-\(.*\)-.*/\1/'`
        BuildOS=`echo "$build" | sed 's/.*-//'`
    else
        GHC_CONVERT_CPU([$build_cpu], [BuildArch])
        GHC_CONVERT_VENDOR([$build_vendor], [BuildVendor])
67
        GHC_CONVERT_OS([$build_os], [$BuildArch], [BuildOS])
68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86
    fi

    if test "$host_alias" = ""
    then
        if test "$bootstrap_target" != ""
        then
            host=$bootstrap_target
            echo "Host platform inferred as: $host"
        else
            echo "Can't work out host platform"
            exit 1
        fi

        HostArch=`echo "$host" | sed 's/-.*//'`
        HostVendor=`echo "$host" | sed -e 's/.*-\(.*\)-.*/\1/'`
        HostOS=`echo "$host" | sed 's/.*-//'`
    else
        GHC_CONVERT_CPU([$host_cpu], [HostArch])
        GHC_CONVERT_VENDOR([$host_vendor], [HostVendor])
87
        GHC_CONVERT_OS([$host_os], [$HostArch], [HostOS])
88 89 90 91
    fi

    if test "$target_alias" = ""
    then
Simon Marlow's avatar
Simon Marlow committed
92
        if test "$host_alias" != ""
93
        then
Simon Marlow's avatar
Simon Marlow committed
94 95
            GHC_CONVERT_CPU([$host_cpu], [TargetArch])
            GHC_CONVERT_VENDOR([$host_vendor], [TargetVendor])
96
            GHC_CONVERT_OS([$host_os], [$TargetArch],[TargetOS])
97
        else
Simon Marlow's avatar
Simon Marlow committed
98 99 100 101 102 103 104 105
            if test "$bootstrap_target" != ""
            then
                target=$bootstrap_target
                echo "Target platform inferred as: $target"
            else
                echo "Can't work out target platform"
                exit 1
            fi
106

Simon Marlow's avatar
Simon Marlow committed
107 108 109
            TargetArch=`echo "$target" | sed 's/-.*//'`
            TargetVendor=`echo "$target" | sed -e 's/.*-\(.*\)-.*/\1/'`
            TargetOS=`echo "$target" | sed 's/.*-//'`
110 111 112 113
        fi
    else
        GHC_CONVERT_CPU([$target_cpu], [TargetArch])
        GHC_CONVERT_VENDOR([$target_vendor], [TargetVendor])
114
        GHC_CONVERT_OS([$target_os], [$TargetArch], [TargetOS])
115
    fi
116

117 118
    GHC_SELECT_FILE_EXTENSIONS([$host], [exeext_host], [soext_host])
    GHC_SELECT_FILE_EXTENSIONS([$target], [exeext_target], [soext_target])
119 120 121 122 123 124
    windows=NO
    case $host in
    *-unknown-mingw32)
        windows=YES
        ;;
    esac
125

126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166
    BuildPlatform="$BuildArch-$BuildVendor-$BuildOS"
    BuildPlatform_CPP=`echo "$BuildPlatform" | sed -e 's/\./_/g' -e 's/-/_/g'`
    BuildArch_CPP=`    echo "$BuildArch"     | sed -e 's/\./_/g' -e 's/-/_/g'`
    BuildVendor_CPP=`  echo "$BuildVendor"   | sed -e 's/\./_/g' -e 's/-/_/g'`
    BuildOS_CPP=`      echo "$BuildOS"       | sed -e 's/\./_/g' -e 's/-/_/g'`

    HostPlatform="$HostArch-$HostVendor-$HostOS"
    HostPlatform_CPP=`echo "$HostPlatform" | sed -e 's/\./_/g' -e 's/-/_/g'`
    HostArch_CPP=`    echo "$HostArch"     | sed -e 's/\./_/g' -e 's/-/_/g'`
    HostVendor_CPP=`  echo "$HostVendor"   | sed -e 's/\./_/g' -e 's/-/_/g'`
    HostOS_CPP=`      echo "$HostOS"       | sed -e 's/\./_/g' -e 's/-/_/g'`

    TargetPlatform="$TargetArch-$TargetVendor-$TargetOS"
    TargetPlatform_CPP=`echo "$TargetPlatform" | sed -e 's/\./_/g' -e 's/-/_/g'`
    TargetArch_CPP=`    echo "$TargetArch"     | sed -e 's/\./_/g' -e 's/-/_/g'`
    TargetVendor_CPP=`  echo "$TargetVendor"   | sed -e 's/\./_/g' -e 's/-/_/g'`
    TargetOS_CPP=`      echo "$TargetOS"       | sed -e 's/\./_/g' -e 's/-/_/g'`

    echo "GHC build  : $BuildPlatform"
    echo "GHC host   : $HostPlatform"
    echo "GHC target : $TargetPlatform"

    AC_SUBST(BuildPlatform)
    AC_SUBST(HostPlatform)
    AC_SUBST(TargetPlatform)
    AC_SUBST(HostPlatform_CPP)
    AC_SUBST(BuildPlatform_CPP)
    AC_SUBST(TargetPlatform_CPP)

    AC_SUBST(HostArch_CPP)
    AC_SUBST(BuildArch_CPP)
    AC_SUBST(TargetArch_CPP)

    AC_SUBST(HostOS_CPP)
    AC_SUBST(BuildOS_CPP)
    AC_SUBST(TargetOS_CPP)

    AC_SUBST(HostVendor_CPP)
    AC_SUBST(BuildVendor_CPP)
    AC_SUBST(TargetVendor_CPP)

167 168 169 170
    AC_SUBST(exeext_host)
    AC_SUBST(exeext_target)
    AC_SUBST(soext_host)
    AC_SUBST(soext_target)
171 172 173 174 175 176 177 178
])


# FPTOOLS_SET_HASKELL_PLATFORM_VARS
# ----------------------------------
# Set the Haskell platform variables
AC_DEFUN([FPTOOLS_SET_HASKELL_PLATFORM_VARS],
[
179 180
    checkArch() {
        case [$]1 in
181 182 183
        i386)
            test -z "[$]2" || eval "[$]2=ArchX86"
            ;;
184
        x86_64|amd64)
185 186 187 188 189 190 191 192 193 194 195 196 197
            test -z "[$]2" || eval "[$]2=ArchX86_64"
            ;;
        powerpc)
            test -z "[$]2" || eval "[$]2=ArchPPC"
            ;;
        powerpc64)
            test -z "[$]2" || eval "[$]2=ArchPPC_64"
            ;;
        sparc)
            test -z "[$]2" || eval "[$]2=ArchSPARC"
            ;;
        arm)
            GET_ARM_ISA()
198
            test -z "[$]2" || eval "[$]2=\"ArchARM {armISA = \$ARM_ISA, armISAExt = \$ARM_ISA_EXT, armABI = \$ARM_ABI}\""
199
            ;;
200 201 202 203 204 205 206 207 208 209
        alpha)
            test -z "[$]2" || eval "[$]2=ArchAlpha"
            ;;
        mips|mipseb)
            test -z "[$]2" || eval "[$]2=ArchMipseb"
            ;;
        mipsel)
            test -z "[$]2" || eval "[$]2=ArchMipsel"
            ;;
        hppa|hppa1_1|ia64|m68k|rs6000|s390|s390x|sparc64|vax)
210
            test -z "[$]2" || eval "[$]2=ArchUnknown"
211 212 213 214 215 216 217 218 219 220
            ;;
        *)
            echo "Unknown arch [$]1"
            exit 1
            ;;
        esac
    }

    checkVendor() {
        case [$]1 in
221
        dec|unknown|hp|apple|next|sun|sgi|ibm|montavista|portbld)
222 223 224 225 226 227 228 229 230 231
            ;;
        *)
            echo "Unknown vendor [$]1"
            exit 1
            ;;
        esac
    }

    checkOS() {
        case [$]1 in
232 233 234
        linux)
            test -z "[$]2" || eval "[$]2=OSLinux"
            ;;
235 236 237
        ios)
            test -z "[$]2" || eval "[$]2=OSiOS"
            ;;
238 239 240 241 242 243 244 245 246 247 248 249
        darwin)
            test -z "[$]2" || eval "[$]2=OSDarwin"
            ;;
        solaris2)
            test -z "[$]2" || eval "[$]2=OSSolaris2"
            ;;
        mingw32)
            test -z "[$]2" || eval "[$]2=OSMinGW32"
            ;;
        freebsd)
            test -z "[$]2" || eval "[$]2=OSFreeBSD"
            ;;
250 251 252
        dragonfly)
            test -z "[$]2" || eval "[$]2=OSDragonFly"
            ;;
253 254 255
        kfreebsdgnu)
            test -z "[$]2" || eval "[$]2=OSKFreeBSD"
            ;;
256 257 258
        openbsd)
            test -z "[$]2" || eval "[$]2=OSOpenBSD"
            ;;
Ian Lynagh's avatar
Ian Lynagh committed
259 260 261
        netbsd)
            test -z "[$]2" || eval "[$]2=OSNetBSD"
            ;;
pcapriotti's avatar
pcapriotti committed
262 263 264
        haiku)
            test -z "[$]2" || eval "[$]2=OSHaiku"
            ;;
ian@well-typed.com's avatar
ian@well-typed.com committed
265 266 267
        osf3)
            test -z "[$]2" || eval "[$]2=OSOsf3"
            ;;
268 269 270
        nto-qnx)
            test -z "[$]2" || eval "[$]2=OSQNXNTO"
            ;;
ian@well-typed.com's avatar
ian@well-typed.com committed
271
        dragonfly|osf1|hpux|linuxaout|freebsd2|cygwin32|gnu|nextstep2|nextstep3|sunos4|ultrix|irix|aix)
272
            test -z "[$]2" || eval "[$]2=OSUnknown"
273
            ;;
274 275 276
        linux-android)
            test -z "[$]2" || eval "[$]2=OSAndroid"
            ;;
277 278 279 280 281
        *)
            echo "Unknown OS '[$]1'"
            exit 1
            ;;
        esac
282
    }
283

284 285 286 287 288 289 290 291 292 293 294 295 296 297
    dnl ** check for Apple-style dead-stripping support
    dnl    (.subsections-via-symbols assembler directive)

    AC_MSG_CHECKING(for .subsections_via_symbols)
    AC_COMPILE_IFELSE(
        [AC_LANG_PROGRAM([], [__asm__ (".subsections_via_symbols");])],
        [AC_MSG_RESULT(yes)
         HaskellHaveSubsectionsViaSymbols=True
         AC_DEFINE([HAVE_SUBSECTIONS_VIA_SYMBOLS],[1],
                   [Define to 1 if Apple-style dead-stripping is supported.])
        ],
        [HaskellHaveSubsectionsViaSymbols=False
         AC_MSG_RESULT(no)])

298 299 300 301 302 303 304 305 306 307
    dnl ** check for .ident assembler directive

    AC_MSG_CHECKING(whether your assembler supports .ident directive)
    AC_COMPILE_IFELSE(
        [AC_LANG_SOURCE([__asm__ (".ident \"GHC x.y.z\"");])],
        [AC_MSG_RESULT(yes)
         HaskellHaveIdentDirective=True],
        [AC_MSG_RESULT(no)
         HaskellHaveIdentDirective=False])

308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324
    dnl *** check for GNU non-executable stack note support (ELF only)
    dnl     (.section .note.GNU-stack,"",@progbits)

    dnl This test doesn't work with "gcc -g" in gcc 4.4 (GHC trac #3889:
    dnl     Error: can't resolve `.note.GNU-stack' {.note.GNU-stack section} - `.Ltext0' {.text section}
    dnl so we empty CFLAGS while running this test
    CFLAGS2="$CFLAGS"
    CFLAGS=
    AC_MSG_CHECKING(for GNU non-executable stack support)
    AC_COMPILE_IFELSE(
        [AC_LANG_PROGRAM([__asm__ (".section .note.GNU-stack,\"\",@progbits");], [0])],
        [AC_MSG_RESULT(yes)
         HaskellHaveGnuNonexecStack=True],
        [AC_MSG_RESULT(no)
         HaskellHaveGnuNonexecStack=False])
    CFLAGS="$CFLAGS2"

325
    checkArch "$BuildArch" "HaskellBuildArch"
326 327 328
    checkVendor "$BuildVendor"
    checkOS "$BuildOS" ""

329
    checkArch "$HostArch" "HaskellHostArch"
330 331 332 333 334 335 336 337 338
    checkVendor "$HostVendor"
    checkOS "$HostOS" ""

    checkArch "$TargetArch" "HaskellTargetArch"
    checkVendor "$TargetVendor"
    checkOS "$TargetOS" "HaskellTargetOs"

    AC_SUBST(HaskellTargetArch)
    AC_SUBST(HaskellTargetOs)
339
    AC_SUBST(HaskellHaveSubsectionsViaSymbols)
340
    AC_SUBST(HaskellHaveIdentDirective)
341
    AC_SUBST(HaskellHaveGnuNonexecStack)
342 343 344 345 346
])


# GET_ARM_ISA
# ----------------------------------
Gabor Greif's avatar
Gabor Greif committed
347
# Get info about the ISA on the ARM arch
348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390
AC_DEFUN([GET_ARM_ISA],
[
    AC_COMPILE_IFELSE([
        AC_LANG_PROGRAM(
            [],
            [#if defined(__ARM_ARCH_2__)  || \
                 defined(__ARM_ARCH_3__)  || \
                 defined(__ARM_ARCH_3M__) || \
                 defined(__ARM_ARCH_4__)  || \
                 defined(__ARM_ARCH_4T__) || \
                 defined(__ARM_ARCH_5__)  || \
                 defined(__ARM_ARCH_5T__) || \
                 defined(__ARM_ARCH_5E__) || \
                 defined(__ARM_ARCH_5TE__)
                 return 0;
             #else
                 not pre arm v6
             #endif]
        )],
        [AC_DEFINE(arm_HOST_ARCH_PRE_ARMv6, 1, [ARM pre v6])
         AC_DEFINE(arm_HOST_ARCH_PRE_ARMv7, 1, [ARM pre v7])
         changequote(, )dnl
         ARM_ISA=ARMv5
         ARM_ISA_EXT="[]"
         changequote([, ])dnl
        ],
        [
            AC_COMPILE_IFELSE([
                AC_LANG_PROGRAM(
                    [],
                    [#if defined(__ARM_ARCH_6__)   || \
                         defined(__ARM_ARCH_6J__)  || \
                         defined(__ARM_ARCH_6T2__) || \
                         defined(__ARM_ARCH_6Z__)  || \
                         defined(__ARM_ARCH_6ZK__) || \
                         defined(__ARM_ARCH_6M__)
                         return 0;
                     #else
                         not pre arm v7
                     #endif]
                )],
                [AC_DEFINE(arm_HOST_ARCH_PRE_ARMv7, 1, [ARM pre v7])
                 ARM_ISA=ARMv6
391 392 393 394 395 396 397 398 399 400 401
                 AC_COMPILE_IFELSE([
                        AC_LANG_PROGRAM(
                                [],
                                [#if defined(__VFP_FP__)
                                     return 0;
                                #else
                                     no vfp
                                #endif]
                        )],
                        [changequote(, )dnl
                         ARM_ISA_EXT="[VFPv2]"
402 403
                         changequote([, ])dnl
                        ],
404 405
                        [changequote(, )dnl
                         ARM_ISA_EXT="[]"
406 407
                         changequote([, ])dnl
                        ]
408
                )],
409 410
                [changequote(, )dnl
                 ARM_ISA=ARMv7
411
                 ARM_ISA_EXT="[VFPv3,NEON]"
412 413 414
                 changequote([, ])dnl
                ])
        ])
415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441

        AC_COMPILE_IFELSE(
               [AC_LANG_PROGRAM(
                       [],
                       [#if defined(__SOFTFP__)
                            return 0;
                       #else
                            not softfp
                       #endif]
               )],
               [changequote(, )dnl
                ARM_ABI="SOFT"
                changequote([, ])dnl
               ],
               [AC_COMPILE_IFELSE(
                    [AC_LANG_PROGRAM(
                       [],
                       [#if defined(__ARM_PCS_VFP)
                            return 0;
                       #else
                            no hard float ABI
                       #endif]
                    )],
                    [ARM_ABI="HARD"],
                    [ARM_ABI="SOFTFP"]
               )]
        )
442 443 444 445 446 447 448 449 450 451
])


# FP_SETTINGS
# ----------------------------------
# Set the variables used in the settings file
AC_DEFUN([FP_SETTINGS],
[
    if test "$windows" = YES
    then
452 453
        mingw_bin_prefix=mingw/bin/
        SettingsCCompilerCommand="\$topdir/../${mingw_bin_prefix}gcc.exe"
Simon Marlow's avatar
Simon Marlow committed
454
        SettingsLdCommand="\$topdir/../${mingw_bin_prefix}ld.exe"
455
        SettingsArCommand="\$topdir/../${mingw_bin_prefix}ar.exe"
456
        SettingsPerlCommand='$topdir/../perl/perl.exe'
457 458
        SettingsDllWrapCommand="\$topdir/../${mingw_bin_prefix}dllwrap.exe"
        SettingsWindresCommand="\$topdir/../${mingw_bin_prefix}windres.exe"
Ian Lynagh's avatar
Ian Lynagh committed
459
        SettingsTouchCommand='$topdir/touchy.exe'
460 461
    else
        SettingsCCompilerCommand="$WhatGccIsCalled"
Simon Marlow's avatar
Simon Marlow committed
462
        SettingsLdCommand="$LdCmd"
463
        SettingsArCommand="$ArCmd"
464 465 466
        SettingsPerlCommand="$PerlCmd"
        SettingsDllWrapCommand="/bin/false"
        SettingsWindresCommand="/bin/false"
467
        SettingsLibtoolCommand="libtool"
468
        SettingsTouchCommand='touch'
469 470 471 472 473 474 475 476 477 478 479 480
        if test -z "$LlcCmd"
        then
          SettingsLlcCommand="llc"
        else
          SettingsLlcCommand="$LlcCmd"
        fi
        if test -z "$OptCmd"
        then
          SettingsOptCommand="opt"
        else
          SettingsOptCommand="$OptCmd"
        fi
481
    fi
482 483
    SettingsCCompilerFlags="$CONF_CC_OPTS_STAGE2"
    SettingsCCompilerLinkFlags="$CONF_GCC_LINKER_OPTS_STAGE2"
484
    SettingsLdFlags="$CONF_LD_LINKER_OPTS_STAGE2"
485 486
    AC_SUBST(SettingsCCompilerCommand)
    AC_SUBST(SettingsCCompilerFlags)
487
    AC_SUBST(SettingsCCompilerLinkFlags)
Simon Marlow's avatar
Simon Marlow committed
488
    AC_SUBST(SettingsLdCommand)
489
    AC_SUBST(SettingsLdFlags)
490
    AC_SUBST(SettingsArCommand)
491 492 493
    AC_SUBST(SettingsPerlCommand)
    AC_SUBST(SettingsDllWrapCommand)
    AC_SUBST(SettingsWindresCommand)
494
    AC_SUBST(SettingsLibtoolCommand)
495
    AC_SUBST(SettingsTouchCommand)
496 497
    AC_SUBST(SettingsLlcCommand)
    AC_SUBST(SettingsOptCommand)
498 499 500
])


501 502
# FPTOOLS_SET_C_LD_FLAGS
# ----------------------------------
503 504
# Set the C, LD and CPP flags for a given platform
# $1 is the platform
505 506 507 508
# $2 is the name of the CC flags variable
# $3 is the name of the linker flags variable when linking with gcc
# $4 is the name of the linker flags variable when linking with ld
# $5 is the name of the CPP flags variable
509 510
AC_DEFUN([FPTOOLS_SET_C_LD_FLAGS],
[
511
    AC_MSG_CHECKING([Setting up $2, $3, $4 and $5])
512
    case $$1 in
513
    i386-*)
514 515 516 517 518
        # Workaround for #7799
        $2="$$2 -U__i686"
        ;;
    esac

519
    case $$1 in
520
    i386-apple-darwin)
521 522
        $2="$$2 -m32"
        $3="$$3 -m32"
523
        $4="$$4 -arch i386"
524
        $5="$$5 -m32"
525 526 527
        ;;
    x86_64-apple-darwin)
        $2="$$2 -m64"
528
        $3="$$3 -m64"
529 530
        $4="$$4 -arch x86_64"
        $5="$$5 -m64"
531
        ;;
532 533 534 535 536 537 538 539 540 541 542 543 544 545 546
    alpha-*)
        # For now, to suppress the gcc warning "call-clobbered
        # register used for global register variable", we simply
        # disable all warnings altogether using the -w flag. Oh well.
        $2="$$2 -w -mieee -D_REENTRANT"
        $3="$$3 -w -mieee -D_REENTRANT"
        $5="$$5 -w -mieee -D_REENTRANT"
        ;;
    hppa*)
        # ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
        # (very nice, but too bad the HP /usr/include files don't agree.)
        $2="$$2 -D_HPUX_SOURCE"
        $3="$$3 -D_HPUX_SOURCE"
        $5="$$5 -D_HPUX_SOURCE"
        ;;
547
    esac
548 549 550 551 552 553 554 555

    # If gcc knows about the stack protector, turn it off.
    # Otherwise the stack-smash handler gets triggered.
    echo 'int main(void) {return 0;}' > conftest.c
    if $CC -c conftest.c -fno-stack-protector > /dev/null 2>&1
    then
        $2="$$2 -fno-stack-protector"
    fi
556

Ian Lynagh's avatar
Ian Lynagh committed
557
    rm -f conftest.c conftest.o
Ian Lynagh's avatar
Ian Lynagh committed
558
    AC_MSG_RESULT([done])
559 560 561
])


562 563 564 565 566 567 568 569 570 571 572 573 574 575 576
AC_DEFUN([FP_PATH_PROG],[
    AC_PATH_PROG($1,$2,$3,$4,$5,$6)
    # If we have a cygwin path for something, and we try to run it
    # from cabal or python, then it'll fail. So we convert to a
    # native path.
    if test "$HostOS"     = "mingw32" && \
       test "${OSTYPE}"  != "msys"    && \
       test "${$1}" != ""
    then
        # Canonicalise to <drive>:/path/to/gcc
        $1=`cygpath -m "${$1}"`
    fi
])


577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594
# FP_VISIBILITY_HIDDEN
# ----------------------------------
# Is the visibility hidden attribute supported?
AC_DEFUN([FP_VISIBILITY_HIDDEN],
[
    AC_MSG_CHECKING([whether __attribute__((visibility("hidden"))) is supported])
    echo '__attribute__((visibility("hidden"))) void foo(void) {}' > conftest.c
    if $CC -Wall -Werror -c conftest.c > /dev/null 2>&1
    then
        AC_MSG_RESULT([yes])
        AC_DEFINE(HAS_VISIBILITY_HIDDEN, 1, [Has visibility hidden])
    else
        AC_MSG_RESULT([no])
    fi
    rm -f conftest.c conftest.o
])


595 596
# FPTOOLS_FLOAT_WORD_ORDER_BIGENDIAN
# ----------------------------------
Gabor Greif's avatar
Gabor Greif committed
597
# Little endian ARM on Linux with some ABIs has big endian word order
598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621
# in doubles. Define FLOAT_WORDS_BIGENDIAN if this is the case.
AC_DEFUN([FPTOOLS_FLOAT_WORD_ORDER_BIGENDIAN],
  [AC_CACHE_CHECK([whether float word order is big endian], [fptools_cv_float_word_order_bigendian],
    [AC_COMPILE_IFELSE(
      [AC_LANG_PROGRAM(
        [#include <endian.h>],
        [#if defined(__FLOAT_WORD_ORDER) && __FLOAT_WORD_ORDER == BIG_ENDIAN
             return 0;
         #else
             not float word order big endian
         #endif]
      )],
      [fptools_cv_float_word_order_bigendian=yes],
      [fptools_cv_float_word_order_bigendian=no])
    ])
  case $fptools_cv_float_word_order_bigendian in
      yes)
          AC_DEFINE([FLOAT_WORDS_BIGENDIAN], 1,
          [Define to 1 if your processor stores words of floats with
           the most significant byte first]) ;;
  esac
])


622 623
# FP_ARG_WITH_PATH_GNU_PROG
# --------------------
624 625 626 627 628
# Find the specified command on the path or allow a user to set it manually
# with a --with-<command> option. An error will be thrown if the command isn't
# found.
#
# This is ignored on the mingw32 platform.
629
#
630
# $1 = the variable to set
631 632
# $2 = the with option name
# $3 = the command to look for
633 634 635 636 637 638 639 640 641 642 643 644 645
#
AC_DEFUN([FP_ARG_WITH_PATH_GNU_PROG],
[
AC_ARG_WITH($2,
[AC_HELP_STRING([--with-$2=ARG],
        [Use ARG as the path to $2 [default=autodetect]])],
[
    if test "$HostOS" = "mingw32"
    then
        AC_MSG_WARN([Request to use $withval will be ignored])
    else
        $1=$withval
    fi
646 647 648 649

    # Remember that we set this manually.  Used to override CC_STAGE0
    # and friends later, if we are not cross-compiling.
    With_$2=$withval
650 651 652 653
],
[
    if test "$HostOS" != "mingw32"
    then
654 655 656 657 658
        if test "$target_alias" = "" ; then
            AC_PATH_PROG([$1], [$3])
        else
            AC_PATH_PROG([$1], [$target_alias-$3])
        fi
659 660
        if test -z "$$1"
        then
Simon Marlow's avatar
Simon Marlow committed
661
            AC_MSG_ERROR([cannot find $3 in your PATH])
662 663 664 665 666 667 668
        fi
    fi
]
)
]) # FP_ARG_WITH_PATH_GNU_PROG


669 670
# FP_ARG_WITH_PATH_GNU_PROG_OPTIONAL
# --------------------
671 672 673 674
# Same as FP_ARG_WITH_PATH_GNU_PROG but no error will be thrown if the command
# isn't found.
#
# This is ignored on the mingw32 platform.
675 676
#
# $1 = the variable to set
677 678
# $2 = the with option name
# $3 = the command to look for
679 680 681 682 683 684 685 686 687 688 689 690 691
#
AC_DEFUN([FP_ARG_WITH_PATH_GNU_PROG_OPTIONAL],
[
AC_ARG_WITH($2,
[AC_HELP_STRING([--with-$2=ARG],
        [Use ARG as the path to $2 [default=autodetect]])],
[
    if test "$HostOS" = "mingw32"
    then
        AC_MSG_WARN([Request to use $withval will be ignored])
    else
        $1=$withval
    fi
692 693 694 695

    # Remember that we set this manually.  Used to override CC_STAGE0
    # and friends later, if we are not cross-compiling.
    With_$2=$withval
696 697 698 699
],
[
    if test "$HostOS" != "mingw32"
    then
700
        AC_PATH_PROG([$1], [$3])
701 702 703 704 705
    fi
]
)
]) # FP_ARG_WITH_PATH_GNU_PROG_OPTIONAL

706 707 708
# FP_PROG_CONTEXT_DIFF
# --------------------
# Figure out how to do context diffs. Sets the output variable ContextDiffCmd.
709 710
#
# Note: NeXTStep thinks diff'ing a file against itself is "trouble".
711 712 713 714 715
AC_DEFUN([FP_PROG_CONTEXT_DIFF],
[AC_CACHE_CHECK([for a working context diff], [fp_cv_context_diff],
[echo foo > conftest1
echo foo > conftest2
fp_cv_context_diff=no
Ian Lynagh's avatar
Ian Lynagh committed
716
for fp_var in '-U 1' '-u1' '-C 1' '-c1'
717 718 719 720 721 722 723 724 725 726 727 728 729
do
  if diff $fp_var conftest1 conftest2 > /dev/null 2>&1; then
    fp_cv_context_diff="diff $fp_var"
    break
  fi
done])
if test x"$fp_cv_context_diff" = xno; then
   AC_MSG_ERROR([cannot figure out how to do context diffs])
fi
AC_SUBST(ContextDiffCmd, [$fp_cv_context_diff])
])# FP_PROG_CONTEXT_DIFF


730
# FP_COMPUTE_INT(EXPRESSION, VARIABLE, INCLUDES, IF-FAILS)
731
# --------------------------------------------------------
732 733 734
# Assign VARIABLE the value of the compile-time EXPRESSION using INCLUDES for
# compilation. Execute IF-FAILS when unable to determine the value. Works for
# cross-compilation, too.
735 736 737 738
#
# Implementation note: We are lazy and use an internal autoconf macro, but it
# is supported in autoconf versions 2.50 up to the actual 2.57, so there is
# little risk.
739 740 741 742 743 744 745 746 747 748
AC_DEFUN([FP_COMPUTE_INT],
[_AC_COMPUTE_INT([$1], [$2], [$3], [$4])[]dnl
])# FP_COMPUTE_INT


# FP_CHECK_ALIGNMENT(TYPE, [IGNORED], [INCLUDES = DEFAULT-INCLUDES])
# ------------------------------------------------------------------
# A variation of AC_CHECK_SIZEOF for computing the alignment restrictions of a
# given type. Defines ALIGNMENT_TYPE.
AC_DEFUN([FP_CHECK_ALIGNMENT],
749
[AS_LITERAL_IF(m4_translit([[$1]], [*], [p]), [],
750
               [AC_FATAL([$0: requires literal arguments])])[]dnl
751 752 753
AC_CHECK_TYPE([$1], [], [], [$3])[]dnl
m4_pushdef([fp_Cache], [AS_TR_SH([fp_cv_alignment_$1])])[]dnl
AC_CACHE_CHECK([alignment of $1], [fp_Cache],
754
[if test "$AS_TR_SH([ac_cv_type_$1])" = yes; then
755
  FP_COMPUTE_INT([offsetof(struct { char c; $1 ty; },ty)],
756
                 [fp_Cache],
757
                 [AC_INCLUDES_DEFAULT([$3])],
758 759
                 [AC_MSG_ERROR([cannot compute alignment ($1)
See `config.log' for more details.], [77])])
760
else
761 762 763 764
  fp_Cache=0
fi])[]dnl
AC_DEFINE_UNQUOTED(AS_TR_CPP(alignment_$1), $fp_Cache, [The alignment of a `$1'.])[]dnl
m4_popdef([fp_Cache])[]dnl
765 766 767
])# FP_CHECK_ALIGNMENT


768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786
# FP_LEADING_UNDERSCORE
# ---------------------
# Test for determining whether symbol names have a leading underscore. We assume
# that they _haven't_ if anything goes wrong. Sets the output variable
# LeadingUnderscore to YES or NO and defines LEADING_UNDERSCORE correspondingly.
#
# Some nlist implementations seem to try to be compatible by ignoring a leading
# underscore sometimes (eg. FreeBSD). We therefore have to work around this by
# checking for *no* leading underscore first. Sigh.  --SDM
#
# Similarly on OpenBSD, but this test doesn't help. -- dons
AC_DEFUN([FP_LEADING_UNDERSCORE],
[AC_CHECK_LIB([elf], [nlist], [LIBS="-lelf $LIBS"])
AC_CACHE_CHECK([leading underscore in symbol names], [fptools_cv_leading_underscore], [
# Hack!: nlist() under Digital UNIX insist on there being an _,
# but symbol table listings shows none. What is going on here?!?
#
# Another hack: cygwin doesn't come with nlist.h , so we hardwire
# the underscoredness of that "platform"
787
case $HostPlatform in
788
*openbsd*) # x86 openbsd is ELF from 3.4 >, meaning no leading uscore
789 790 791 792 793 794
  case $build in
    i386-*2\.@<:@0-9@:>@ | i386-*3\.@<:@0-3@:>@ ) fptools_cv_leading_underscore=yes ;;
    *) fptools_cv_leading_underscore=no ;;
  esac ;;
alpha-dec-osf*) fptools_cv_leading_underscore=no;;
*cygwin32) fptools_cv_leading_underscore=yes;;
795 796
i386-unknown-mingw32) fptools_cv_leading_underscore=yes;;
x86_64-unknown-mingw32) fptools_cv_leading_underscore=no;;
797 798 799

    # HACK: Apple doesn't seem to provide nlist in the 64-bit-libraries
x86_64-apple-darwin*) fptools_cv_leading_underscore=yes;;
800
*-apple-ios) fptools_cv_leading_underscore=yes;;
801

802
*) AC_RUN_IFELSE([AC_LANG_SOURCE([[#ifdef HAVE_NLIST_H
sof's avatar
sof committed
803
#include <nlist.h>
804 805
struct nlist xYzzY1[] = {{"xYzzY1", 0},{0}};
struct nlist xYzzY2[] = {{"_xYzzY2", 0},{0}};
sof's avatar
sof committed
806 807
#endif

808 809 810
int main(argc, argv)
int argc;
char **argv;
sof's avatar
sof committed
811 812
{
#ifdef HAVE_NLIST_H
813 814 815
    if(nlist(argv[0], xYzzY1) == 0 && xYzzY1[0].n_value != 0)
        exit(1);
    if(nlist(argv[0], xYzzY2) == 0 && xYzzY2[0].n_value != 0)
816
        exit(0);
sof's avatar
sof committed
817 818
#endif
    exit(1);
819
}]])],[fptools_cv_leading_underscore=yes],[fptools_cv_leading_underscore=no],[fptools_cv_leading_underscore=no])
820
;;
821 822 823 824 825
esac]);
AC_SUBST([LeadingUnderscore], [`echo $fptools_cv_leading_underscore | sed 'y/yesno/YESNO/'`])
if test x"$fptools_cv_leading_underscore" = xyes; then
   AC_DEFINE([LEADING_UNDERSCORE], [1], [Define to 1 if C symbols have a leading underscore added by the compiler.])
fi])# FP_LEADING_UNDERSCORE
sof's avatar
sof committed
826

827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854

# FP_COMPARE_VERSIONS(VERSION1, TEST, VERSION2, [ACTION-IF-TRUE], [ACTION-IF-FALSE])
# ----------------------------------------------------------------------------------
# Compare dotted version numbers VERSION1 and VERSION2 lexicographically according
# to TEST (one of -eq, -ne, -lt, -le, -gt, or -ge).
AC_DEFUN([FP_COMPARE_VERSIONS],
[fp_version1=$1; fp_version2=$3
fp_save_IFS=$IFS; IFS='.'
while test x"$fp_version1" != x || test x"$fp_version2" != x
do

  set dummy $fp_version1; shift
  fp_num1=""
  test $[@%:@] = 0 || { fp_num1="[$]1"; shift; }
  test x"$fp_num1" = x && fp_num1="0"
  fp_version1="[$]*"

  set dummy $fp_version2; shift
  fp_num2=""
  test $[@%:@] = 0 || { fp_num2="[$]1"; shift; }
  test x"$fp_num2" = x && fp_num2="0"
  fp_version2="[$]*"

  test "$fp_num1" = "$fp_num2" || break;
done
IFS=$fp_save_IFS
AS_IF([test "$fp_num1" $2 "$fp_num2"], [$4], [$5])[]dnl
])# FP_COMPARE_VERSIONS
855 856


sof's avatar
sof committed
857
dnl
858
dnl Check for Happy and version.  If we're building GHC, then we need
krakrjak's avatar
krakrjak committed
859
dnl at least Happy version 1.19.  If there's no installed Happy, we look
860 861
dnl for a happy source tree and point the build system at that instead.
dnl
862
AC_DEFUN([FPTOOLS_HAPPY],
863
[FP_PATH_PROG(HappyCmd,happy,)
864

sof's avatar
sof committed
865
AC_CACHE_CHECK([for version of happy], fptools_cv_happy_version,
sof's avatar
sof committed
866
changequote(, )dnl
867
[if test x"$HappyCmd" != x; then
868 869
   fptools_cv_happy_version=`"$HappyCmd" -v |
			  grep 'Happy Version' | sed -e 's/Happy Version \([^ ]*\).*/\1/g'` ;
sof's avatar
sof committed
870
else
sof's avatar
sof committed
871
   fptools_cv_happy_version="";
sof's avatar
sof committed
872
fi;
873
changequote([, ])dnl
874
])
875
if test ! -f compiler/parser/Parser.hs || test ! -f compiler/cmm/CmmParse.hs || test ! -f compiler/parser/ParserCore.hs
876
then
877 878
    FP_COMPARE_VERSIONS([$fptools_cv_happy_version],[-lt],[1.19],
      [AC_MSG_ERROR([Happy version 1.19 or later is required to compile GHC.])])[]
879
fi
880
HappyVersion=$fptools_cv_happy_version;
sof's avatar
sof committed
881 882 883
AC_SUBST(HappyVersion)
])

884 885
dnl
dnl Check for Alex and version.  If we're building GHC, then we need
886
dnl at least Alex version 2.1.1.
887
dnl
888
AC_DEFUN([FPTOOLS_ALEX],
889
[
890
FP_PATH_PROG(AlexCmd,alex,)
891

892 893
AC_CACHE_CHECK([for version of alex], fptools_cv_alex_version,
changequote(, )dnl
894
[if test x"$AlexCmd" != x; then
895 896
   fptools_cv_alex_version=`"$AlexCmd" -v |
			  grep 'Alex [Vv]ersion' | sed -e 's/Alex [Vv]ersion \([0-9\.]*\).*/\1/g'` ;
897 898 899 900 901
else
   fptools_cv_alex_version="";
fi;
changequote([, ])dnl
])
902 903
FP_COMPARE_VERSIONS([$fptools_cv_alex_version],[-ge],[3.0],
  [Alex3=YES],[Alex3=NO])
904 905
if test ! -f compiler/cmm/CmmLex.hs || test ! -f compiler/parser/Lexer.hs
then
906 907
    FP_COMPARE_VERSIONS([$fptools_cv_alex_version],[-lt],[3.1.0],
      [AC_MSG_ERROR([Alex version 3.1.0 or later is required to compile GHC.])])[]
908
fi
909 910
AlexVersion=$fptools_cv_alex_version;
AC_SUBST(AlexVersion)
911
AC_SUBST(Alex3)
912 913
])

sof's avatar
sof committed
914

915 916 917 918 919
# FP_PROG_LD_FLAG
# ---------------
# Sets the output variable $2 to $1 if ld supports the $1 flag.
# Otherwise the variable's value is empty.
AC_DEFUN([FP_PROG_LD_FLAG],
920
[
921
AC_CACHE_CHECK([whether ld understands $1], [fp_cv_$2],
922
[echo 'int foo() { return 0; }' > conftest.c
923
${CC-cc} -c conftest.c
924 925
if ${LdCmd} -r $1 -o conftest2.o conftest.o > /dev/null 2>&1; then
   fp_cv_$2=$1
926
else
927
   fp_cv_$2=
928
fi
929
rm -rf conftest*])
930 931 932 933
$2=$fp_cv_$2
])# FP_PROG_LD_FLAG


934 935 936 937 938 939 940 941
# FP_PROG_LD_BUILD_ID
# ------------

# Sets the output variable LdHasBuildId to YES if ld supports
# --build-id, or NO otherwise.
AC_DEFUN([FP_PROG_LD_BUILD_ID],
[
AC_CACHE_CHECK([whether ld understands --build-id], [fp_cv_ld_build_id],
942
[echo 'int foo() { return 0; }' > conftest.c
943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958
${CC-cc} -c conftest.c
if ${LdCmd} -r --build-id=none -o conftest2.o conftest.o > /dev/null 2>&1; then
   fp_cv_ld_build_id=yes
else
   fp_cv_ld_build_id=no
fi
rm -rf conftest*])
if test "$fp_cv_ld_build_id" = yes; then
  LdHasBuildId=YES
else
  LdHasBuildId=NO
fi
AC_SUBST([LdHasBuildId])
])# FP_PROG_LD_BUILD_ID


959 960 961 962 963
# FP_PROG_LD_IS_GNU
# -----------------
# Sets the output variable LdIsGNULd to YES or NO, depending on whether it is
# GNU ld or not.
AC_DEFUN([FP_PROG_LD_IS_GNU],
964
[
965 966 967 968 969 970 971 972
AC_CACHE_CHECK([whether ld is GNU ld], [fp_cv_gnu_ld],
[if ${LdCmd} --version 2> /dev/null | grep "GNU" > /dev/null 2>&1; then
  fp_cv_gnu_ld=yes
else
  fp_cv_gnu_ld=no
fi])
AC_SUBST([LdIsGNULd], [`echo $fp_cv_gnu_ld | sed 'y/yesno/YESNO/'`])
])# FP_PROG_LD_IS_GNU
973

sof's avatar
sof committed
974

975 976 977 978 979 980 981 982
# FP_PROG_LD_NO_COMPACT_UNWIND
# ----------------------------

# Sets the output variable LdHasNoCompactUnwind to YES if ld supports
# -no_compact_unwind, or NO otherwise.
AC_DEFUN([FP_PROG_LD_NO_COMPACT_UNWIND],
[
AC_CACHE_CHECK([whether ld understands -no_compact_unwind], [fp_cv_ld_no_compact_unwind],
983
[echo 'int foo() { return 0; }' > conftest.c
984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999
${CC-cc} -c conftest.c
if ${LdCmd} -r -no_compact_unwind -o conftest2.o conftest.o > /dev/null 2>&1; then
   fp_cv_ld_no_compact_unwind=yes
else
   fp_cv_ld_no_compact_unwind=no
fi
rm -rf conftest*])
if test "$fp_cv_ld_no_compact_unwind" = yes; then
  LdHasNoCompactUnwind=YES
else
  LdHasNoCompactUnwind=NO
fi
AC_SUBST([LdHasNoCompactUnwind])
])# FP_PROG_LD_NO_COMPACT_UNWIND


1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031
# FP_PROG_LD_FILELIST
# -------------------

# Sets the output variable LdHasFilelist to YES if ld supports
# -filelist, or NO otherwise.
AC_DEFUN([FP_PROG_LD_FILELIST],
[
AC_CACHE_CHECK([whether ld understands -filelist], [fp_cv_ld_has_filelist],
[
    echo 'int foo() { return 0; }' > conftest1.c
    echo 'int bar() { return 0; }' > conftest2.c
    ${CC-cc} -c conftest1.c
    ${CC-cc} -c conftest2.c
    echo conftest1.o  > conftest.o-files
    echo conftest2.o >> conftest.o-files
    if ${LdCmd} -r -filelist conftest.o-files -o conftest.o > /dev/null 2>&1
    then
        fp_cv_ld_has_filelist=yes
    else
        fp_cv_ld_has_filelist=no
    fi
    rm -rf conftest*
])
if test "$fp_cv_ld_has_filelist" = yes; then
    LdHasFilelist=YES
else
    LdHasFilelist=NO
fi
AC_SUBST([LdHasFilelist])
])# FP_PROG_LD_FILELIST


1032 1033
# FP_PROG_AR
# ----------
Ian Lynagh's avatar
Ian Lynagh committed
1034
# Sets fp_prog_ar to a (non-Cygwin) path to ar. Exits if no ar can be found
1035
AC_DEFUN([FP_PROG_AR],
1036 1037
[FP_PATH_PROG([fp_prog_ar], [ar])
if test -z "$fp_prog_ar"; then
1038
  AC_MSG_ERROR([cannot find ar in your PATH, no idea how to make a library])
sof's avatar
sof committed
1039
fi
1040 1041 1042 1043 1044 1045 1046 1047
])# FP_PROG_AR


# FP_PROG_AR_IS_GNU
# -----------------
# Sets fp_prog_ar_is_gnu to yes or no, depending on whether it is GNU ar or not.
AC_DEFUN([FP_PROG_AR_IS_GNU],
[AC_REQUIRE([FP_PROG_AR])
Ian Lynagh's avatar
Ian Lynagh committed
1048 1049
AC_CACHE_CHECK([whether $fp_prog_ar is GNU ar], [fp_cv_prog_ar_is_gnu],
[if "$fp_prog_ar" --version 2> /dev/null | grep "GNU" > /dev/null 2>&1; then
1050 1051 1052 1053 1054
  fp_cv_prog_ar_is_gnu=yes
else
  fp_cv_prog_ar_is_gnu=no
fi])
fp_prog_ar_is_gnu=$fp_cv_prog_ar_is_gnu
Ian Lynagh's avatar
Ian Lynagh committed
1055
AC_SUBST([ArIsGNUAr], [`echo $fp_prog_ar_is_gnu | tr 'a-z' 'A-Z'`])
1056 1057 1058
])# FP_PROG_AR_IS_GNU


1059 1060 1061 1062 1063 1064 1065
# FP_PROG_AR_SUPPORTS_ATFILE
# -----------------
# Sets fp_prog_ar_supports_atfile to yes or no, depending on whether
# or not it supports the @file syntax
AC_DEFUN([FP_PROG_AR_SUPPORTS_ATFILE],
[AC_REQUIRE([FP_PROG_AR])
 AC_REQUIRE([FP_PROG_AR_ARGS])
Ian Lynagh's avatar
Ian Lynagh committed
1066
AC_CACHE_CHECK([whether $fp_prog_ar supports @file], [fp_cv_prog_ar_supports_atfile],
1067 1068 1069 1070 1071
[
rm -f conftest*
touch conftest.file
echo conftest.file  > conftest.atfile
echo conftest.file >> conftest.atfile
Ian Lynagh's avatar
Ian Lynagh committed
1072 1073
"$fp_prog_ar" $fp_prog_ar_args conftest.a @conftest.atfile > /dev/null 2>&1
fp_prog_ar_supports_atfile_tmp=`"$fp_prog_ar" t conftest.a 2> /dev/null | grep -c conftest.file`
1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084
rm -f conftest*
if test "$fp_prog_ar_supports_atfile_tmp" -eq 2
then
  fp_cv_prog_ar_supports_atfile=yes
else
  fp_cv_prog_ar_supports_atfile=no
fi])
fp_prog_ar_supports_atfile=$fp_cv_prog_ar_supports_atfile
AC_SUBST([ArSupportsAtFile], [`echo $fp_prog_ar_supports_atfile | tr 'a-z' 'A-Z'`])
])# FP_PROG_AR_SUPPORTS_ATFILE

1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101
# FP_PROG_AR_ARGS
# ---------------
# Sets fp_prog_ar_args to the arguments for ar and the output variable ArCmd
# to a non-Cygwin invocation of ar including these arguments.
AC_DEFUN([FP_PROG_AR_ARGS],
[AC_REQUIRE([FP_PROG_AR_IS_GNU])
AC_CACHE_CHECK([for ar arguments], [fp_cv_prog_ar_args],
[
# GNU ar needs special treatment: it appears to have problems with
# object files with the same name if you use the 's' modifier, but
# simple 'ar q' works fine, and doesn't need a separate ranlib.
if test $fp_prog_ar_is_gnu = yes; then
  fp_cv_prog_ar_args="q"
else
  touch conftest.dummy
  for fp_var in clqsZ clqs cqs clq cq ; do
     rm -f conftest.a
Ian Lynagh's avatar
Ian Lynagh committed
1102
     if "$fp_prog_ar" $fp_var conftest.a conftest.dummy > /dev/null 2> /dev/null; then
1103 1104 1105 1106 1107 1108
        fp_cv_prog_ar_args=$fp_var
        break
     fi
  done
  rm -f conftest*
  if test -z "$fp_cv_prog_ar_args"; then
Ian Lynagh's avatar
Ian Lynagh committed
1109
    AC_MSG_ERROR([cannot figure out how to use your $fp_prog_ar])
1110 1111 1112
  fi
fi])
fp_prog_ar_args=$fp_cv_prog_ar_args
1113 1114
AC_SUBST([ArCmd], ["$fp_prog_ar"])
AC_SUBST([ArArgs], ["$fp_prog_ar_args"])
1115 1116 1117 1118 1119 1120

])# FP_PROG_AR_ARGS


# FP_PROG_AR_NEEDS_RANLIB
# -----------------------
1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147
# Sets the output variable RANLIB_CMD to "ranlib" if it is needed and
# found, to "true" otherwise. Sets REAL_RANLIB_CMD to the ranlib program,
# even if we don't need ranlib (libffi might still need it).
AC_DEFUN([FP_PROG_AR_NEEDS_RANLIB],[
    AC_REQUIRE([FP_PROG_AR_IS_GNU])
    AC_REQUIRE([FP_PROG_AR_ARGS])
    AC_REQUIRE([AC_PROG_CC])

    AC_PROG_RANLIB

    if test $fp_prog_ar_is_gnu = yes
    then
        fp_cv_prog_ar_needs_ranlib=no
    elif test "$TargetOS_CPP" = "darwin"
    then
        # It's quite tedious to check for Apple's crazy timestamps in
        # .a files, so we hardcode it.
        fp_cv_prog_ar_needs_ranlib=yes
    else
        case $fp_prog_ar_args in
        *s*)
            fp_cv_prog_ar_needs_ranlib=no;;
        *)
            fp_cv_prog_ar_needs_ranlib=yes;;
        esac
    fi

1148 1149 1150 1151 1152 1153 1154 1155 1156 1157
    # workaround for AC_PROG_RANLIB which sets RANLIB to `:' when
    # ranlib is missing on the target OS. The problem is that
    # ghc-cabal cannot execute `:' which is a shell built-in but can
    # execute `true' which is usually simple program supported by the
    # OS.
    # Fixes #8795
    if test "$RANLIB" = ":"
    then
        RANLIB="true"
    fi
1158 1159 1160 1161 1162 1163 1164 1165 1166
    REAL_RANLIB_CMD="$RANLIB"
    if test $fp_cv_prog_ar_needs_ranlib = yes
    then
        RANLIB_CMD="$RANLIB"
    else
        RANLIB_CMD="true"
    fi
    AC_SUBST([REAL_RANLIB_CMD])
    AC_SUBST([RANLIB_CMD])
1167 1168 1169
])# FP_PROG_AR_NEEDS_RANLIB


1170
# FP_GCC_VERSION
1171 1172
# -----------
# Extra testing of the result AC_PROG_CC, testing the gcc version no. Sets the
1173
# output variable GccVersion.
1174
AC_DEFUN([FP_GCC_VERSION],
1175
[AC_REQUIRE([AC_PROG_CC])
1176
if test -z "$CC"
1177
then
1178 1179
  AC_MSG_ERROR([gcc is required])
fi
1180 1181
GccLT34=NO
GccLT46=NO
1182
AC_CACHE_CHECK([version of gcc], [fp_cv_gcc_version],
1183 1184 1185 1186 1187 1188 1189 1190
[
    fp_cv_gcc_version="`$CC -v 2>&1 | grep 'version ' | sed -e 's/.*version [[^0-9]]*\([[0-9.]]*\).*/\1/g'`"
    FP_COMPARE_VERSIONS([$fp_cv_gcc_version], [-lt], [3.0],
                        [AC_MSG_ERROR([Need at least gcc version 3.0 (3.4+ recommended)])])
    # See #2770: gcc 2.95 doesn't work any more, apparently.  There probably
    # isn't a very good reason for that, but for now just make configure
    # fail.
    FP_COMPARE_VERSIONS([$fp_cv_gcc_version], [-lt], [3.4], GccLT34=YES)
1191
    FP_COMPARE_VERSIONS([$fp_cv_gcc_version], [-lt], [4.6], GccLT46=YES)
1192
])
1193
AC_SUBST([GccVersion], [$fp_cv_gcc_version])
1194
AC_SUBST(GccLT34)
1195
AC_SUBST(GccLT46)
1196
])# FP_GCC_VERSION
1197

1198
dnl Check to see if the C compiler is clang or llvm-gcc
1199
dnl
1200
GccIsClang=NO
1201 1202
AC_DEFUN([FP_CC_LLVM_BACKEND],
[AC_REQUIRE([AC_PROG_CC])
1203
AC_MSG_CHECKING([whether C compiler is clang])
1204
$CC -x c /dev/null -dM -E > conftest.txt 2>&1
1205 1206
if grep "__clang__" conftest.txt >/dev/null 2>&1; then
  AC_SUBST([CC_CLANG_BACKEND], [1])
1207
  AC_SUBST([CC_LLVM_BACKEND], [1])
1208
  GccIsClang=YES
1209 1210 1211
  AC_MSG_RESULT([yes])
else
  AC_MSG_RESULT([no])
1212 1213 1214 1215 1216 1217 1218 1219 1220 1221
  AC_MSG_CHECKING([whether C compiler has an LLVM back end])
  if grep "__llvm__" conftest.txt >/dev/null 2>&1; then
    AC_SUBST([CC_CLANG_BACKEND], [0])
    AC_SUBST([CC_LLVM_BACKEND], [1])
    AC_MSG_RESULT([yes])
  else
    AC_SUBST([CC_CLANG_BACKEND], [0])
    AC_SUBST([CC_LLVM_BACKEND], [0])
    AC_MSG_RESULT([no])
  fi
1222
fi
1223
AC_SUBST(GccIsClang)
1224

1225 1226 1227
rm -f conftest.txt
])

sof's avatar
sof committed
1228
dnl Small feature test for perl version. Assumes PerlCmd
1229 1230 1231 1232
dnl contains path to perl binary.
dnl
dnl (Perl versions prior to v5.6 does not contain the string "v5";
dnl instead they display version strings such as "version 5.005".)
sof's avatar
sof committed
1233
dnl
1234
AC_DEFUN([FPTOOLS_CHECK_PERL_VERSION],
sof's avatar
sof committed
1235
[$PerlCmd -v >conftest.out 2>&1
1236
   if grep "v5" conftest.out >/dev/null 2>&1; then
1237 1238
      :
   else
1239
      AC_MSG_ERROR([your version of perl probably won't work, try upgrading it.])
1240
   fi
sof's avatar
sof committed
1241 1242
rm -fr conftest*
])
1243

1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258

# FP_CHECK_PROG(VARIABLE, PROG-TO-CHECK-FOR,
#               [VALUE-IF-NOT-FOUND], [PATH], [REJECT])
# -----------------------------------------------------
# HACK: A small wrapper around AC_CHECK_PROG, setting VARIABLE to the full path
# of PROG-TO-CHECK-FOR when found.
AC_DEFUN([FP_CHECK_PROG],
[AC_CHECK_PROG([$1], [$2], [$as_dir/$ac_word$ac_exec_ext], [$3], [$4], [$5])][]dnl
)# FP_CHECK_PROC


# FP_PROG_FIND
# ------------
# Find a non-WinDoze version of the "find" utility.
AC_DEFUN([FP_PROG_FIND],
Ian Lynagh's avatar
Ian Lynagh committed
1259
[AC_PATH_PROGS([fp_prog_find], [gfind find], find)
1260 1261 1262 1263
echo foo > conftest.txt
$fp_prog_find conftest.txt -print > conftest.out 2>&1
if grep '^conftest.txt$' conftest.out > /dev/null 2>&1 ; then
  # OK, looks like a real "find".
1264 1265 1266 1267 1268 1269 1270 1271 1272
  case $HostPlatform in
    *mingw32)
      if test x${OSTYPE} != xmsys
      then
 	    fp_prog_find="`cygpath --mixed ${fp_prog_find}`"
        AC_MSG_NOTICE([normalized find command to $fp_prog_find])
      fi ;;
    *) ;;
  esac
1273
  FindCmd="$fp_prog_find"
sof's avatar
sof committed
1274
else
1275 1276 1277
  # Found a poor WinDoze version of "find", ignore it.
  AC_MSG_WARN([$fp_prog_find looks like a non-*nix find, ignoring it])
  FP_CHECK_PROG([FindCmd], [find], [], [], [$fp_prog_find])
sof's avatar
sof committed
1278
fi
1279 1280 1281 1282
rm -f conftest.txt conftest.out
AC_SUBST([FindCmd])[]dnl
])# FP_PROG_FIND

sof's avatar
sof committed
1283

1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303
# FP_PROG_SORT
# ------------
# Find a Unix-like sort
AC_DEFUN([FP_PROG_SORT],
[AC_PATH_PROG([fp_prog_sort], [sort])
echo conwip > conftest.txt
$fp_prog_sort -f conftest.txt > conftest.out 2>&1
if grep 'conwip' conftest.out > /dev/null 2>&1 ; then
  # The goods
  SortCmd="$fp_prog_sort"
else
  # Summink else..pick next one.
  AC_MSG_WARN([$fp_prog_sort looks like a non-*nix sort, ignoring it])
  FP_CHECK_PROG([SortCmd], [sort], [], [], [$fp_prog_sort])
fi
rm -f conftest.txt conftest.out
AC_SUBST([SortCmd])[]dnl
])# FP_PROG_SORT


1304 1305 1306 1307 1308 1309 1310
dnl
dnl FPTOOLS_NOCACHE_CHECK prints a message, then sets the
dnl values of the second argument to the result of running
dnl the commands given by the third. It does not cache its
dnl result, so it is suitable for checks which should be
dnl run every time.
dnl
1311
AC_DEFUN([FPTOOLS_NOCACHE_CHECK],
1312 1313 1314 1315 1316
[AC_MSG_CHECKING([$1])
 $3
 AC_MSG_RESULT([$][$2])
])

1317 1318 1319
dnl
dnl FPTOOLS_GHC_VERSION(version)
dnl FPTOOLS_GHC_VERSION(major, minor [, patchlevel])
1320
dnl FPTOOLS_GHC_VERSION(version, major, minor, patchlevel)
1321 1322
dnl
dnl Test for version of installed ghc.  Uses $GHC.
1323
dnl [original version pinched from c2hs]
1324
dnl
1325
AC_DEFUN([FPTOOLS_GHC_VERSION],
1326
[FPTOOLS_NOCACHE_CHECK([version of ghc], [fptools_version_of_ghc],
1327
["${WithGhc-ghc}" --version > conftestghc 2>&1
1328
  cat conftestghc >&AS_MESSAGE_LOG_FD
1329 1330
#Useless Use Of cat award...
  fptools_version_of_ghc=`cat conftestghc | sed -n -e 's/, patchlevel *\([[0-9]]\)/.\1/;s/.* version \([[0-9]][[0-9.]]*\).*/\1/p'`
1331
  rm -fr conftest*
1332
  if test "[$]fptools_version_of_ghc" = ""
1333
  then
1334 1335 1336 1337 1338 1339 1340
    fptools_version_of_ghc='unknown'
  fi
fptools_version_of_ghc[_major]=`echo [$]fptools_version_of_ghc | sed -e 's/^\([[0-9]]\).*/\1/'`
fptools_version_of_ghc[_minor]=`echo [$]fptools_version_of_ghc | sed -e 's/^[[0-9]]\.\([[0-9]]*\).*/\1/'`
fptools_version_of_ghc[_pl]=`echo [$]fptools_version_of_ghc | sed -n -e 's/^[[0-9]]\.[[0-9]]*\.\([[0-9]]*\)/\1/p'`
#
if test "[$]fptools_version_of_ghc[_pl]" = ""
1341
then
1342 1343
  fptools_version_of_ghc[_all]="[$]fptools_version_of_ghc[_major].[$]fptools_version_of_ghc[_minor]"
  fptools_version_of_ghc[_pl]="0"
1344
else
1345
  fptools_version_of_ghc[_all]="[$]fptools_version_of_ghc[_major].[$]fptools_version_of_ghc[_minor].[$]fptools_version_of_ghc[_pl]"
1346
fi
1347
#
1348
ifelse($#, [1], [dnl
1349
[$1]="[$]fptools_version_of_ghc[_all]"
1350
], $#, [2], [dnl
1351 1352
[$1]="[$]fptools_version_of_ghc[_major]"
[$2]="[$]fptools_version_of_ghc[_minor]"
1353
], $#, [3], [dnl
1354 1355 1356
[$1]="[$]fptools_version_of_ghc[_major]"
[$2]="[$]fptools_version_of_ghc[_minor]"
[$3]="[$]fptools_version_of_ghc[_pl]"
1357
], $#, [4], [dnl
1358 1359 1360 1361 1362 1363
[$1]="[$]fptools_version_of_ghc[_all]"
[$2]="[$]fptools_version_of_ghc[_major]"
[$3]="[$]fptools_version_of_ghc[_minor]"
[$4]="[$]fptools_version_of_ghc[_pl]"
])
])
1364
])dnl
1365 1366


1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384
# FP_CHECK_FUNC(FUNCTION, PROLOGUE, BODY, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
# ---------------------------------------------------------------------------------
# A variant of AC_CHECK_FUNCS, limited to a single FUNCTION, but with the
# additional flexibility of specifying the PROLOGUE and BODY.
AC_DEFUN([FP_CHECK_FUNC],
[AS_VAR_PUSHDEF([fp_func], [fp_cv_func_$1])dnl
AC_CACHE_CHECK([for $1], fp_func,
[AC_LINK_IFELSE([AC_LANG_PROGRAM([$2], [$3])],
                [AS_VAR_SET(fp_func, yes)],
                [AS_VAR_SET(fp_func, no)])])
AS_IF([test AS_VAR_GET(fp_func) = yes],
      [AC_DEFINE(AS_TR_CPP(HAVE_$1), [1],
                [Define to 1 if you have the `]$1[' function.]) $4],
      [$5])dnl
AS_VAR_POPDEF([fp_func])dnl
])# FP_CHECK_FUNC


1385 1386
# FP_GEN_DOCBOOK_XML
# ------------------
1387
# Generates a DocBook XML V4.5 document in conftest.xml.
1388 1389 1390 1391 1392 1393 1394
#
# It took a lot of experimentation to find a document that will cause
# xsltproc to fail with an error code when the relevant
# stylesheets/DTDs are not found.  I couldn't make xsltproc fail with
# a single-file document, it seems a multi-file document is needed.
# -- SDM 2009-06-03
#
1395
AC_DEFUN([FP_GEN_DOCBOOK_XML],
1396
[rm -f conftest.xml conftest-book.xml
1397 1398
cat > conftest.xml << EOF
<?xml version="1.0" encoding="iso-8859-1"?>
1399 1400
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
   "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [[
1401 1402
<!ENTITY conftest-book SYSTEM "conftest-book.xml">
]]>
1403
<book id="test">
1404 1405 1406 1407 1408 1409
&conftest-book;
</book>
EOF
cat >conftest-book.xml << EOF
<?xml version="1.0" encoding="iso-8859-1"?>
  <title>A DocBook &ldquo;Test Document&rdquo;</title>
1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421
  <chapter id="id-one">
    <title>A Chapter Title</title>
    <para>This is a paragraph, referencing <xref linkend="id-two"/>.</para>
  </chapter>
  <chapter id="id-two">
    <title>Another Chapter Title</title>
    <para>This is another paragraph, referencing <xref linkend="id-one"/>.</para>
  </chapter>
EOF
]) # FP_GEN_DOCBOOK_XML


1422 1423 1424 1425 1426 1427
# FP_PROG_DBLATEX
# ----------------
# Sets the output variable DblatexCmd to the full path of dblatex,
# which we use for building PDF and PS docs.
# DblatexCmd is empty if dblatex could not be found.
AC_DEFUN([FP_PROG_DBLATEX],
1428
[FP_PATH_PROG([DblatexCmd], [dblatex])
1429 1430 1431 1432 1433 1434
if test -z "$DblatexCmd"; then
  AC_MSG_WARN([cannot find dblatex in your PATH, you will not be able to build the PDF and PS documentation])
fi
])# FP_PROG_DBLATEX


1435 1436 1437 1438 1439
# FP_PROG_XSLTPROC
# ----------------
# Sets the output variable XsltprocCmd to the full path of the XSLT processor
# xsltproc. XsltprocCmd is empty if xsltproc could not be found.
AC_DEFUN([FP_PROG_XSLTPROC],
1440
[FP_PATH_PROG([XsltprocCmd], [xsltproc])
1441
if test -z "$XsltprocCmd"; then
1442
  AC_MSG_WARN([cannot find xsltproc in your PATH, you will not be able to build the HTML documentation])
1443 1444 1445 1446
fi
])# FP_PROG_XSLTPROC


1447
# FP_DOCBOOK_XSL
1448
# ----------------------------
1449
# Check that we can process a DocBook XML document to HTML using xsltproc.
1450
AC_DEFUN([FP_DOCBOOK_XSL],
1451 1452
[AC_REQUIRE([FP_PROG_XSLTPROC])dnl
if test -n "$XsltprocCmd"; then
1453
  AC_CACHE_CHECK([for DocBook XSL stylesheet], fp_cv_dir_docbook_xsl,
1454 1455
  [FP_GEN_DOCBOOK_XML
  fp_cv_dir_docbook_xsl=no
1456 1457 1458
  if $XsltprocCmd --nonet http://docbook.sourceforge.net/release/xsl/current/html/chunk.xsl conftest.xml > /dev/null 2>&1; then
     fp_cv_dir_docbook_xsl=yes
  fi
1459 1460 1461 1462
  rm -rf conftest*])
fi
if test x"$fp_cv_dir_docbook_xsl" = xno; then
  AC_MSG_WARN([cannot find DocBook XSL stylesheets, you will not be able to build the documentation])
1463
  HAVE_DOCBOOK_XSL=NO
1464
else
1465
  HAVE_DOCBOOK_XSL=YES
1466
fi
1467 1468
AC_SUBST([HAVE_DOCBOOK_XSL])
])# FP_DOCBOOK_XSL
1469 1470 1471 1472 1473 1474 1475


# FP_PROG_XMLLINT
# ----------------
# Sets the output variable XmllintCmd to the full path of the XSLT processor
# xmllint. XmllintCmd is empty if xmllint could not be found.
AC_DEFUN([FP_PROG_XMLLINT],
1476
[FP_PATH_PROG([XmllintCmd], [xmllint])
1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489
if test -z "$XmllintCmd"; then
  AC_MSG_WARN([cannot find xmllint in your PATH, you will not be able to validate your documentation])
fi
])# FP_PROG_XMLLINT


# FP_CHECK_DOCBOOK_DTD
# --------------------
AC_DEFUN([FP_CHECK_DOCBOOK_DTD],
[AC_REQUIRE([FP_PROG_XMLLINT])dnl
if test -n "$XmllintCmd"; then
  AC_MSG_CHECKING([for DocBook DTD])
  FP_GEN_DOCBOOK_XML
1490
  if $XmllintCmd --nonet --valid --noout conftest.xml ; then
1491 1492 1493
    AC_MSG_RESULT([ok])
  else
    AC_MSG_RESULT([failed])
1494
    AC_MSG_WARN([cannot find a DTD for DocBook XML V4.5, you will not be able to validate your documentation])
1495 1496 1497 1498 1499 1500 1501
    AC_MSG_WARN([check your XML_CATALOG_FILES environment variable and/or /etc/xml/catalog])
  fi
  rm -rf conftest*
fi
])# FP_CHECK_DOCBOOK_DTD


1502 1503 1504
# FP_PROG_GHC_PKG
# ----------------
# Try to find a ghc-pkg matching the ghc mentioned in the environment variable
Ian Lynagh's avatar
Ian Lynagh committed
1505
# WithGhc. Sets the output variable GhcPkgCmd.
1506 1507
AC_DEFUN([FP_PROG_GHC_PKG],
[AC_CACHE_CHECK([for ghc-pkg matching $WithGhc], fp_cv_matching_ghc_pkg,
Ian Lynagh's avatar
Ian Lynagh committed
1508 1509 1510 1511 1512 1513 1514 1515
[
# If we are told to use ghc-stage2, then we're using an in-tree
# compiler. In this case, we just want ghc-pkg, not ghc-pkg-stage2,
# so we sed off -stage[0-9]$. However, if we are told to use
# ghc-6.12.1 then we want to use ghc-pkg-6.12.1, so we keep any
# other suffix.
fp_ghc_pkg_guess=`echo $WithGhc | sed -e 's/-stage@<:@0-9@:>@$//' -e 's,ghc\(@<:@^/\\@:>@*\)$,ghc-pkg\1,'`
if "$fp_ghc_pkg_guess" list > /dev/null 2>&1; then
1516
  fp_cv_matching_ghc_pkg=$fp_ghc_pkg_guess
1517
else
Ian Lynagh's avatar
Ian Lynagh committed
1518
  AC_MSG_ERROR([Cannot find matching ghc-pkg])
1519
fi])
Ian Lynagh's avatar
Ian Lynagh committed
1520 1521 1522
GhcPkgCmd=$fp_cv_matching_ghc_pkg
AC_SUBST([GhcPkgCmd])
])# FP_PROG_GHC_PKG
1523

1524

1525 1526 1527 1528 1529 1530 1531 1532 1533
# FP_GCC_EXTRA_FLAGS
# ------------------
# Determine which extra flags we need to pass gcc when we invoke it
# to compile .hc code.
#
# -fwrapv is needed for gcc to emit well-behaved code in the presence of
# integer wrap around. (Trac #952)
#
AC_DEFUN([FP_GCC_EXTRA_FLAGS],
1534
[AC_REQUIRE([FP_GCC_VERSION])
1535 1536
AC_CACHE_CHECK([for extra options to pass gcc when compiling via C], [fp_cv_gcc_extra_opts],
[fp_cv_gcc_extra_opts=
1537
 FP_COMPARE_VERSIONS([$fp_cv_gcc_version], [-ge], [3.4],
1538 1539 1540 1541 1542
  [fp_cv_gcc_extra_opts="$fp_cv_gcc_extra_opts -fwrapv"],
  [])
])
AC_SUBST([GccExtraViaCOpts],$fp_cv_gcc_extra_opts)
])
1543

1544

1545 1546 1547
# FP_SETUP_PROJECT_VERSION
# ---------------------
AC_DEFUN([FP_SETUP_PROJECT_VERSION],
1548 1549 1550
[
if test "$RELEASE" = "NO"; then
    AC_MSG_CHECKING([for GHC version date])
1551 1552
    if test -f VERSION_DATE; then
        PACKAGE_VERSION=${PACKAGE_VERSION}.`cat VERSION_DATE`
Ian Lynagh's avatar
Ian Lynagh committed
1553
        AC_MSG_RESULT(given $PACKAGE_VERSION)
1554 1555
    elif test -d .git; then
        changequote(, )dnl
1556
        ver_date=`git log -n 1 --date=short --pretty=format:%ci | cut -d ' ' -f 1 | tr -d -`
1557 1558 1559 1560 1561 1562
        if echo $ver_date | grep '^[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]$' 2>&1 >/dev/null; then true; else
        changequote([, ])dnl
                AC_MSG_ERROR([failed to detect version date: check that git is in your path])
        fi
        PACKAGE_VERSION=${PACKAGE_VERSION}.$ver_date
        AC_MSG_RESULT(inferred $PACKAGE_VERSION)
1563
    elif test -f VERSION; then
1564
        PACKAGE_VERSION=`cat VERSION`
Ian Lynagh's avatar
Ian Lynagh committed
1565
        AC_MSG_RESULT(given $PACKAGE_VERSION)
1566
    else
1567
        AC_MSG_WARN([cannot determine snapshot version: no .git directory and no VERSION file])
Gabor Greif's avatar
Gabor Greif committed
1568
        dnl We'd really rather this case didn't happen, but it might
1569 1570 1571 1572 1573 1574 1575 1576
        dnl do (in particular, people using lndir trees may find that
        dnl the build system can't find any other date). If it does
        dnl happen, then we use the current date.
        dnl This way we get some idea about how recent a build is.
        dnl It also means that packages built for 2 different builds
        dnl will probably use different version numbers, so things are
        dnl less likely to go wrong.
        PACKAGE_VERSION=${PACKAGE_VERSION}.`date +%Y%m%d`
1577 1578 1579 1580
    fi
fi